From 1972 to his death in 1979, he was Chichele Professor of Public International Law at the University of Oxford.
He was admitted to the New Zealand Bar in 1947 and then attended Trinity College, Cambridge in 1949, from where he obtained a doctorate in 1951.
His career then took him to Oxford in 1972, where he was elected Chichele Professor of Public International Law.
Among his former pupils is James Crawford,[1] who was elected as Judge of the International Court of Justice in 2014.
He had been nominated for a British life peerage but this procedure was not completed before his death.